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Arnold D. Robbins 5a18f63b8d Set the close-on-exec flag for file and pipe redirections. 3 years ago
bugs-fixed Simplify getline-numeric input and results. 4 years ago
testdir Make I/O errors fatal instead of mere warnings (#63) 3 years ago
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ChangeLog Set the close-on-exec flag for file and pipe redirections. 3 years ago
FIXES Fix Issue 60; sub/gsub follow POSIX if POSIXLY_CORRECT in the environment. 3 years ago
LICENSE initial commit for github 10 years ago
README.md Correct text in README.md. 3 years ago
REGRESS Fix REGRESS so all tests run on Mac OS X. 4 years ago
TODO Set the close-on-exec flag for file and pipe redirections. 3 years ago
awk.1 Fix Issue 60; sub/gsub follow POSIX if POSIXLY_CORRECT in the environment. 3 years ago
awk.h Convert variables to bool and enum. 3 years ago
awkgram.y Convert variables to bool and enum. 3 years ago
b.c Minor fixes. 3 years ago
lex.c Minor fixes. 3 years ago
lib.c Convert variables to bool and enum. 3 years ago
main.c Fix Issue 60; sub/gsub follow POSIX if POSIXLY_CORRECT in the environment. 3 years ago
makefile Add 'distclean' target to makefile. 3 years ago
maketab.c more cleanups (#55) 3 years ago
parse.c More cleanups: (#53) 3 years ago
proto.h Convert variables to bool and enum. 3 years ago
run.c Set the close-on-exec flag for file and pipe redirections. 3 years ago
tran.c Minor fixes. 3 years ago

README.md

The One True Awk

This is the version of awk described in The AWK Programming Language, by Al Aho, Brian Kernighan, and Peter Weinberger (Addison-Wesley, 1988, ISBN 0-201-07981-X).

Copyright (C) Lucent Technologies 1997
All Rights Reserved

Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that the copyright notice and this permission notice and warranty disclaimer appear in supporting documentation, and that the name Lucent Technologies or any of its entities not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission.

LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Distribution and Reporting Problems

Changes, mostly bug fixes and occasional enhancements, are listed in FIXES. If you distribute this code further, please please please distribute FIXES with it.

If you find errors, please report them to bwk@cs.princeton.edu. Please also open an issue in the GitHub issue tracker, to make it easy to track issues. Thanks.

Submitting Pull Requests

Pull requests are welcome. However, please create them with a request to merge into the staging branch instead of into the master branch. This allows us to do testing, and to make any additional edits or changes after the merge but before merging to master.

Building

The program itself is created by

make

which should produce a sequence of messages roughly like this:

yacc -d awkgram.y
conflicts: 43 shift/reduce, 85 reduce/reduce
mv y.tab.c ytab.c
mv y.tab.h ytab.h
cc -c ytab.c
cc -c b.c
cc -c main.c
cc -c parse.c
cc maketab.c -o maketab
./maketab >proctab.c
cc -c proctab.c
cc -c tran.c
cc -c lib.c
cc -c run.c
cc -c lex.c
cc ytab.o b.o main.o parse.o proctab.o tran.o lib.o run.o lex.o -lm

This produces an executable a.out; you will eventually want to move this to some place like /usr/bin/awk.

If your system does not have yacc or bison (the GNU equivalent), you need to install one of them first.

NOTE: This version uses ANSI C (C 99), as you should also. We have compiled this without any changes using gcc -Wall and/or local C compilers on a variety of systems, but new systems or compilers may raise some new complaint; reports of difficulties are welcome.

This compiles without change on Macintosh OS X using gcc and the standard developer tools.

The version of malloc that comes with some systems is sometimes astonishly slow. If awk seems slow, you might try fixing that. More generally, turning on optimization can significantly improve awk's speed, perhaps by 1/3 for highest levels.

Last Updated

Wed Jan 1 22:44:38 IST 2020